SI91871DMP-26-E3

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The SI91871DMP-26-E3 is a low drop out (LDO) linear voltage regulator, intended for use with power supply applications such as microprocessors, ASICs, analog and mixed-signal circuits and field-effect transistor (FET) drivers. This LDO regulator provides an adjustable output voltage of 1.25V to 1.9V with typical efficiencies of up to 95%. It features a programmable current limit threshold and adjustable current limit features, as well as a wide input voltage range from 2.5V to 15.8V and a low output voltage point of 2.5V, making it suitable for a wide range of applications.

The SI91871DMP-26-E3\'s low output noise, low quiescent current, fast tracking time and low thermal resistance allow it to be used in a variety of power management applications, such as microprocessors, microcontroller-based systems, and power-sensitive analog and mixed-signal integrated circuits. This LDO regulator has a low output impedance, with low ESR, and it can support up to 3A of continuous output current with a minimum dropout voltage of 50mV. The SI91871DMP-26-E3 also features programmable current limit thresholds and adjustable current limit characteristics to help protect against overload conditions.

The working principle of the SI91871DMP-26-E3 is simple; it regulates its output voltage with respect to the input voltage. The output voltage is referenced to the supply voltage, and the output current is limited to the value set by the current limit threshold. The SI91871DMP-26-E3 utilizes a low dropout (LDO) linear regulator to maintain a very low output impedance, providing excellent line and load regulation. It also features thermal protection, over-current protection, and reverse current protection.

The SI91871DMP-26-E3 is ideal for use in a wide range of power management applications, such as microprocessor systems, networking systems, server applications and other power-sensitive analog and mixed-signal integrated circuits. It is designed to operate over a wide temperature range of -40°C to +125°C and is available in a SOT-23-5 package. With its low quiescent current, programmable current limit threshold and adjustable current limit features, this LDO regulator makes an ideal choice for many power management applications.

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